Fish Encyclopedia
Search and identify 1,000+ fish species — freshwater, saltwater, reef, and pelagic — with habitat, size, diet, behavior, and how to tell them apart.
Rummy-nose Tetra
A small schooling Amazonian tetra known for its bright red-orange snout and a bold black-and-white striped tail fin, prized in aquariums for its striking coloration and tight shoaling behavior.
freshwater
Round Herring
Named for its unusually rounded, cylindrical body, the Round Herring is a schooling coastal pelagic fish found in temperate and subtropical seas worldwide, serving as an important forage species for larger predators.
pelagic
Volitans Lionfish
A large, boldly banded lionfish with dramatic trailing fins, an ambush predator now invasive across the western Atlantic.
reef
Lionfish
A striking, striped reef predator native to the Indo-Pacific, now a widespread and ecologically disruptive invasive species across the Western Atlantic and Caribbean, easily recognized by its fan-like fins and venomous spines.
reef
Harlequin Rasbora
A small, deep-bodied freshwater fish with a coppery-orange body and a distinctive black triangular patch covering the rear half, native to the blackwater streams of Southeast Asia.
freshwater
Redlip Blenny
A dark, elongated blenny with a distinctive bright red-orange lip, common on shallow Caribbean and western Atlantic reef edges where it grazes algae from rock and coral.
reef
Redear Sunfish
A deep-bodied sunfish named for the bright red-orange margin on its black ear flap, notable for its specialized diet of snails and other mollusks in warm southern lakes and ponds.
freshwater
Fathead Minnow
A small, hardy North American minnow famous as baitfish and a standard toxicology test species, able to survive low-oxygen, turbid water most fish avoid.
freshwater
Asian Arowana
A large, brightly colored freshwater fish prized for its metallic scales and dragon-like appearance, native to Southeast Asian rivers and now considered endangered in the wild.
freshwater
Redbanded Seabream
The redbanded seabream is a deep-bodied, pinkish-red sparid marked by four to five dark vertical bands, found over rocky and sandy bottoms in the eastern Atlantic and Mediterranean.
saltwater
Mangrove Jack
A deep red Indo-Pacific snapper whose juveniles grow up in mangrove estuaries and rivers, tolerating salinities from freshwater to full seawater.
brackish
Longspine Snapper
The longspine snapper is a slender, bright red deepwater snapper known for an elongated filament trailing from its dorsal fin, found on steep offshore slopes across the Indo-Pacific.
deepsea
Flame Tetra
A Rio de Janeiro coastal stream characin with a graduated flame-like color pattern from silver at the head to red-orange at the tail.
freshwater
Cherry Shrimp
A small freshwater shrimp selectively bred into a vivid cherry-red color form, popular for its algae- and detritus-grazing habits.
freshwater
Redtooth Triggerfish
The Redtooth Triggerfish is a deep blue-green triggerfish often seen schooling in large numbers over reef drop-offs, feeding on plankton in the open water column.
reef
Cinnamon Clownfish
A deep reddish-orange clownfish with dark shading across the body and a single white head bar, living among sea anemones on coral reefs of the western Pacific.
reef
Banded Pipefish
The banded pipefish is a slender reef fish patterned with bold reddish-brown and white rings along its entire body, ending in a fan-shaped yellow tail fin marked with a dark spot.
reef
Redband Parrotfish
A small, variable Caribbean parrotfish; terminal males are green with a red band and a distinctive yellow-and-black shoulder spot.
reef
Stoplight Loosejaw
A deep-sea dragonfish with a hinge-less lower jaw and a rare ability to emit and see red bioluminescent light, invisible to most other deep-sea animals, effectively a private searchlight.
deepsea
Twinspot Wrasse
A large Indo-Pacific wrasse; juveniles are white with two red-and-black spots, while old males become bulky and greenish with a forehead hump.
reef
Bristol Bay Sockeye
Bristol Bay sockeye are the world's largest wild sockeye salmon run, turning brilliant red with olive-green heads as they surge from the Bering Sea into Alaska's rivers to spawn.
freshwater
Rummynose Tetra
A slender silvery tetra known for its bright red-orange snout and a bold black-and-white striped tail, prized for tight, synchronized shoaling.
freshwater
Two-Banded Clownfish
An orange anemonefish with two broad white bars, the characteristic clownfish of the Red Sea and adjacent Gulf of Aden reefs, always found sheltering among host anemones.
reef
Serpae Tetra
A vividly red-bodied tetra with a bold black shoulder patch, known for its assertive, nippy temperament within shoaling groups.
freshwater